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Registered Member #190
Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
The simplest permanent magnet 3phase generator has three coils and one rotating magnetic pole consisting of a N-S pair. My question is very specific: can one have two poles (4 magnets total) with three coils for a three phase generator?
Registered Member #72
Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
and one rotating magnetic pole consisting of a N-S pair.
conventionally, a single magnet has a North pole and a South pole, so 2 poles per magnet.
So if you mean "can one have two magnets (4 poles total) with 3 coils", the answer is yes. You will get 2 electrical cycles per revolution of the rotor, rather than one, if they are arranged in the obvious way.
If you mean " can one have two poles (4 magnets total)", then I don't know what you mean.
Registered Member #8
Joined: Thu Feb 02 2006, 04:34AM
Location: Harlowton, MT, United States
Posts: 214
A typical car alternator is a 3 phase generator with 8 or 12 rotating poles, so definitely. Thus it is easy for them to output well over 1kHz, by the means that NeilThomas explained. A 3 phase generator is just the same as a 3 phase synchronous motor being driven.
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3 phase generator
